.page-about {
  background: var(--moon);
  color: var(--ink);
  font-family: var(--font-body);
}

.page-about .about-crumbs {
  padding-top: 24px;
  padding-bottom: 8px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  background: var(--abyss);
  color: var(--warm);
  border-bottom: var(--border-w) solid var(--ink);
  padding: 40px 0 56px;
}

.page-about .about-hero__inner {
  display: grid;
  gap: 36px;
}

.page-about .about-hero__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--amber);
  margin: 0 0 18px;
}

.page-about .about-hero__no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 34px;
  padding: 0 8px;
  background: var(--amber);
  color: var(--abyss);
  border: 2px solid var(--ink);
  font-weight: 700;
}

.page-about .about-hero__title {
  font-family: var(--font-head);
  font-weight: 650;
  font-size: clamp(34px, 7.2vw, 78px);
  line-height: 1.03;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  color: var(--warm);
}

.page-about .about-hero__accent {
  color: var(--amber);
}

.page-about .about-hero__lead {
  font-size: clamp(15px, 2.2vw, 18px);
  line-height: 1.75;
  max-width: 46ch;
  margin: 0 0 28px;
  color: rgba(247, 243, 236, 0.86);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid rgba(217, 154, 43, 0.5);
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 26px 16px 0;
  margin-right: 26px;
  border-right: 1px solid rgba(201, 206, 214, 0.25);
}

.page-about .about-hero__stat:last-child {
  border-right: 0;
  margin-right: 0;
}

.page-about .about-hero__stat-num {
  font-family: var(--font-head);
  font-weight: 650;
  font-size: 30px;
  line-height: 1;
  color: var(--amber);
}

.page-about .about-hero__stat-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(201, 206, 214, 0.9);
}

.page-about .about-hero__figure {
  margin: 0;
  border: var(--border-w) solid var(--ink);
  box-shadow: 10px 10px 0 var(--amber);
  background: var(--moon);
  overflow: hidden;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

/* ---------- 主体双栏 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding-top: 56px;
  padding-bottom: 72px;
}

.page-about .about-toc {
  border-bottom: 1px solid rgba(10, 22, 34, 0.18);
  padding-bottom: 20px;
}

.page-about .about-toc__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--abyss);
  margin: 0 0 12px;
  text-transform: uppercase;
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
}

.page-about .about-toc__link {
  display: inline-block;
  font-size: 14px;
  color: var(--abyss);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
  transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  border-bottom-color: var(--amber);
  color: var(--abyss-light);
  transform: translateY(-1px);
  outline: none;
}

.page-about .about-toc__hint {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(10, 22, 34, 0.6);
  margin: 14px 0 0;
}

/* ---------- 章节 ---------- */
.page-about .about-body {
  display: flex;
  flex-direction: column;
  gap: 64px;
  min-width: 0;
}

.page-about .chapter {
  scroll-margin-top: 96px;
}

.page-about .chapter__head {
  display: grid;
  gap: 10px;
  border-top: 6px solid var(--abyss);
  padding-top: 20px;
  margin-bottom: 30px;
}

.page-about .chapter__num {
  font-family: var(--font-mono);
  font-size: 42px;
  line-height: 1;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: -0.02em;
}

.page-about .chapter__title {
  font-family: var(--font-head);
  font-weight: 650;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--abyss);
  margin: 0;
}

.page-about .chapter__lead {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(10, 22, 34, 0.78);
  margin: 0;
  max-width: 62ch;
}

.page-about .chapter__foot {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(10, 22, 34, 0.62);
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 4px solid var(--mist);
}

.page-about .chapter__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .note-block {
  background: var(--warm);
  border: var(--border-w) solid var(--ink);
  box-shadow: var(--shadow-mid);
  padding: 22px 22px 24px;
}

.page-about .note-block--amber {
  background: var(--amber-light);
}

.page-about .note-block__kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--abyss);
  margin: 0 0 10px;
}

.page-about .note-block__text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  margin: 0;
}

/* ---------- 版本时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0 0 34px;
  padding: 0 0 0 4px;
  border-left: var(--border-w) solid var(--abyss);
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 26px 30px;
  transition: transform 0.22s ease;
}

.page-about .timeline__item:last-child {
  padding-bottom: 4px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -13px;
  top: 4px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--moon);
  border: var(--border-w) solid var(--abyss);
}

.page-about .timeline__item:nth-child(even)::before {
  background: var(--mist);
  border-color: var(--abyss);
}

.page-about .timeline__item:last-child::before {
  background: var(--amber);
}

.page-about .timeline__item:hover {
  transform: translateX(4px);
}

.page-about .timeline__stage {
  font-family: var(--font-head);
  font-weight: 650;
  font-size: 19px;
  line-height: 1.35;
  color: var(--abyss);
  margin: 0 0 6px;
}

.page-about .timeline__detail {
  font-size: 15px;
  line-height: 1.78;
  color: rgba(10, 22, 34, 0.76);
  margin: 0;
  max-width: 58ch;
}

.page-about .about-figure {
  margin: 0;
  border: var(--border-w) solid var(--ink);
  box-shadow: var(--shadow-soft);
  background: var(--silver);
  overflow: hidden;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .about-figure .figure-frame__caption {
  display: block;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--abyss);
  background: var(--light-gray);
  border-top: 1px solid rgba(10, 22, 34, 0.16);
}

/* ---------- 维护方法三卡 ---------- */
.page-about .method-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .method-card {
  background: var(--warm);
  border: var(--border-w) solid var(--ink);
  padding: 24px 22px 22px;
  position: relative;
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

.page-about .method-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 6px;
  background: var(--amber);
}

.page-about .method-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-mid);
  border-color: var(--abyss-light);
}

.page-about .method-card__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--abyss);
  margin: 6px 0 12px;
}

.page-about .method-card__title {
  font-family: var(--font-head);
  font-weight: 650;
  font-size: 21px;
  line-height: 1.3;
  color: var(--abyss);
  margin: 0 0 12px;
}

.page-about .method-card__text {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(10, 22, 34, 0.78);
  margin: 0 0 16px;
}

.page-about .method-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
}

/* ---------- 团队 ---------- */
.page-about .team-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .team-split__figure {
  margin: 0;
  border: var(--border-w) solid var(--ink);
  box-shadow: var(--shadow-hard);
  background: var(--silver);
  overflow: hidden;
}

.page-about .team-split__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .team-split__body {
  min-width: 0;
}

.page-about .team-stats {
  margin: 0;
  border-top: var(--border-w) solid var(--abyss);
}

.page-about .team-stats__row {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(10, 22, 34, 0.16);
}

.page-about .team-stats__key {
  font-family: var(--font-head);
  font-weight: 650;
  font-size: 16px;
  color: var(--abyss);
}

.page-about .team-stats__val {
  font-size: 15px;
  line-height: 1.75;
  color: rgba(10, 22, 34, 0.78);
  margin: 0;
}

.page-about .team-split__note {
  margin: 20px 0 0;
  padding: 16px 18px;
  background: var(--mist);
  color: var(--warm);
  border-left: 6px solid var(--abyss);
  font-size: 14px;
  line-height: 1.75;
}

/* ---------- 协作伙伴 ---------- */
.page-about .partner-list {
  display: grid;
  gap: 14px;
}

.page-about .partner {
  background: var(--warm);
  border: var(--border-w) solid var(--ink);
  box-shadow: var(--shadow-soft);
}

.page-about .partner__summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 650;
  font-size: 17px;
  color: var(--abyss);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.page-about .partner__summary::-webkit-details-marker {
  display: none;
}

.page-about .partner__summary:hover {
  background: var(--amber-light);
}

.page-about .partner__no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--abyss);
  background: var(--moon);
  border: 1px solid rgba(10, 22, 34, 0.3);
  padding: 4px 8px;
  flex: none;
}

.page-about .partner__name {
  flex: 1 1 auto;
  min-width: 0;
}

.page-about .partner__hint {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: rgba(10, 22, 34, 0.6);
  flex: none;
}

.page-about .partner[open] .partner__summary {
  border-bottom: 1px solid rgba(10, 22, 34, 0.18);
  background: var(--amber-light);
}

.page-about .partner__body {
  padding: 16px 18px 20px;
}

.page-about .partner__body p {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(10, 22, 34, 0.78);
  margin: 0;
}

/* ---------- 收藏 CTA ---------- */
.page-about .collect-cta {
  background: var(--abyss);
  color: var(--warm);
  border-top: var(--border-w) solid var(--ink);
  padding: 52px 0 58px;
}

.page-about .collect-cta__inner {
  display: grid;
  gap: 28px;
}

.page-about .collect-cta__eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
  margin: 0 0 14px;
}

.page-about .collect-cta__title {
  font-family: var(--font-head);
  font-weight: 650;
  font-size: clamp(26px, 4.4vw, 44px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--warm);
  margin: 0 0 16px;
}

.page-about .collect-cta__desc {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(201, 206, 214, 0.92);
  margin: 0;
  max-width: 54ch;
}

.page-about .collect-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: flex-start;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 56px 0 72px;
  }

  .page-about .chapter__head {
    grid-template-columns: 132px minmax(0, 1fr);
    column-gap: 28px;
    grid-template-areas:
      "num title"
      "num lead";
  }

  .page-about .chapter__num {
    grid-area: num;
    font-size: 56px;
  }

  .page-about .chapter__title {
    grid-area: title;
  }

  .page-about .chapter__lead {
    grid-area: lead;
  }

  .page-about .chapter__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .team-stats__row {
    grid-template-columns: 168px minmax(0, 1fr);
    align-items: baseline;
    column-gap: 20px;
  }

  .page-about .collect-cta__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    align-items: end;
    gap: 40px;
  }

  .page-about .collect-cta__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: end;
    gap: 56px;
  }

  .page-about .about-layout {
    grid-template-columns: 216px minmax(0, 1fr);
    column-gap: 64px;
    padding-top: 72px;
    padding-bottom: 96px;
  }

  .page-about .about-toc {
    border-bottom: 0;
    padding-bottom: 0;
  }

  .page-about .about-toc__sticky {
    position: sticky;
    top: 96px;
  }

  .page-about .about-toc__list {
    flex-direction: column;
    gap: 12px;
  }

  .page-about .about-body {
    gap: 84px;
  }

  .page-about .method-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
    padding-bottom: 56px;
    align-items: start;
  }

  .page-about .method-card:nth-child(2) {
    transform: translateY(26px);
  }

  .page-about .method-card:nth-child(3) {
    transform: translateY(52px);
  }

  .page-about .method-card:nth-child(2):hover {
    transform: translateY(23px);
  }

  .page-about .method-card:nth-child(3):hover {
    transform: translateY(49px);
  }

  .page-about .team-split {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    column-gap: 44px;
    align-items: start;
  }

  .page-about .team-split__figure {
    margin-top: 34px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    column-gap: 80px;
  }
}
<<<END>>>